Invention Application
- Patent Title: Multiple pass write method and reticle
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Application No.: US09968955Application Date: 2001-10-03
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Publication No.: US20020071998A1Publication Date: 2002-06-13
- Inventor: Eugene A. DeLaRosa
- Main IPC: G03F009/00
- IPC: G03F009/00 ; G21K001/08 ; H01J003/14 ; H01J003/26 ; H01J049/42

Abstract:
A multiple pass write method and a reticle made from the method are described. A reticle preform is provided including a transparent substrate, a metal layer, and a layer of a photoresist material. In a first write pass, a first portion of the photoresist material is exposed by an electron beam device. Then, in a second write pass, a second portion of the photoresist material is exposed. The first exposed portion is smaller or has finer dimensions than the second exposed portion. The exposed portions of photoresist material are removed, and the unexposed portions of photoresist serve as a mask. The uncovered portions of the conductive layer are etched. Further, the unexposed portions of the photoresist material are removed, creating a reticle through a multiple write pass strategy.
Public/Granted literature
- US06642530B2 Multiple pass write method and reticle Public/Granted day:2003-11-04
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